Original Article
Prabhu SP, Kukalkar TS, Heredi
Abstract
Colorimetric sensor derived from ninhydrin is presented for the selective visual detection of heavy (toxic) metals Co (II) and Cu (II). The colour complex formed is stable at a wide range of pH. The detection limit of this colourimetric sensor in water is comparatively lower and was exploited to prepare optical solid sensor. Filter paper dip sticks developed was employed as a sensor to detect the presence and to distinguish between Co (II) and Cu (II).